netdev - Re: [PATCH v1 1/2] dtb: xgene: fix: Disable 10GbE and SGMII based 1GbE by default

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Message-ID: <2461768.hHqNmTQE9x@wuerfel>
Date:	Tue, 04 Nov 2014 10:40:18 +0100
From:	Arnd Bergmann <arnd@...db.de>
To:	linux-arm-kernel@...ts.infradead.org
Cc:	Iyappan Subramanian <isubramanian@....com>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	netdev <netdev@...r.kernel.org>, patches <patches@....com>,
	Keyur Chudgar <kchudgar@....com>,
	David Miller <davem@...emloft.net>
Subject: Re: [PATCH v1 1/2] dtb: xgene: fix: Disable 10GbE and SGMII based 1GbE by default

On Monday 03 November 2014 11:45:44 Iyappan Subramanian wrote:
> 
> On Thu, Oct 30, 2014 at 3:13 AM, Arnd Bergmann <arnd@...db.de> wrote:
> > On Wednesday 29 October 2014 17:56:19 Iyappan Subramanian wrote:
> >> @@ -621,7 +621,7 @@
> >>                         };
> >>                 };
> >>
> >> -               sgenet0: ethernet@...10000 {
> >> +               sgenet0: sgenet@...10000 {
> >>                         compatible = "apm,xgene-enet";
> >>                         status = "disabled";
> >>                         reg = <0x0 0x1f210000 0x0 0x10000>,
> >>
> >
> > This looks like you accidentally reverted a bug fix made earlier.
> > Network devices should always have the name 'ethernet@...'.
> 
> Thanks for the review.  Since our firmware was patching the dtb, based
> on the node-name, we thought by changing node-name, we can avoid the
> patching and maintain backward compatibility.
> 
> Now we know that network devices should have 'ethernet@...', we will
> handle the backward compatibility in a different way and will post the
> patch v2 shortly.

It's not important enough to break backwards compatibility over this.
If you can't find a better way to handle compatibility with the old
firmware, just add a comment explaining the node name.

	Arnd
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